diff --git a/hw-packed-vector.cabal b/hw-packed-vector.cabal
--- a/hw-packed-vector.cabal
+++ b/hw-packed-vector.cabal
@@ -1,7 +1,7 @@
 cabal-version:      2.2
 
 name:               hw-packed-vector
-version:            0.2.0.0
+version:            0.2.0.1
 synopsis:           Packed Vector
 description:        Packed Vector. Please see README.md
 category:           Data, Vector
@@ -13,9 +13,9 @@
 copyright:          2016-2019 John Ky
 license:            BSD-3-Clause
 license-file:       LICENSE
+tested-with:        GHC == 8.8.1, GHC == 8.6.5, GHC == 8.4.4, GHC == 8.2.2
 build-type:         Simple
-extra-source-files:
-  README.md
+extra-source-files: README.md
 
 source-repository head
   type: git
@@ -28,7 +28,7 @@
 common criterion            { build-depends: criterion            >= 1.4.1.0    && < 1.6    }
 common deepseq              { build-depends: deepseq              >= 1.4        && < 1.5    }
 common directory            { build-depends: directory            >= 1.3        && < 1.4    }
-common generic-lens         { build-depends: generic-lens         >= 1.1.0.0    && < 1.2    }
+common generic-lens         { build-depends: generic-lens         >= 1.1.0.0    && < 1.3    }
 common hedgehog             { build-depends: hedgehog             >= 0.6        && < 1.1    }
 common hspec                { build-depends: hspec                >= 2.7.1      && < 3      }
 common hw-bits              { build-depends: hw-bits              >= 0.7.0.6    && < 0.8    }
@@ -36,14 +36,14 @@
 common hw-hspec-hedgehog    { build-depends: hw-hspec-hedgehog    >= 0.1.0.7    && < 0.2    }
 common hw-prim              { build-depends: hw-prim              >= 0.6.2.27   && < 0.7    }
 common lens                 { build-depends: lens                 >= 4          && < 5      }
-common optparse-applicative { build-depends: optparse-applicative >= 0.14       && < 0.15   }
+common optparse-applicative { build-depends: optparse-applicative >= 0.14       && < 0.16   }
 common vector               { build-depends: vector               >= 0.12.0.3   && < 0.13   }
 
 common semigroups   { if impl(ghc <  8    ) { build-depends: semigroups     >= 0.16     && < 0.19 } }
 
 common config
-  default-language: Haskell2010
-  ghc-options:      -Wall -O2 -msse4.2
+  default-language:     Haskell2010
+  ghc-options:          -Wall -O2 -msse4.2
 
 library
   import:   base, config
@@ -72,10 +72,10 @@
           , optparse-applicative
           , semigroups
           , vector
-  main-is:          Main.hs
-  hs-source-dirs:   app
-  ghc-options:      -threaded -rtsopts -with-rtsopts=-N -O2
-  build-depends:    hw-packed-vector
+  main-is:              Main.hs
+  hs-source-dirs:       app
+  ghc-options:          -threaded -rtsopts -with-rtsopts=-N -O2
+  build-depends:        hw-packed-vector
   other-modules:
       App.Commands
       App.Commands.CreateIndex
@@ -91,17 +91,17 @@
           , hw-hspec-hedgehog
           , hw-prim
           , vector
-  type:             exitcode-stdio-1.0
-  main-is:          Spec.hs
+  type:                 exitcode-stdio-1.0
+  main-is:              Spec.hs
   other-modules:
       HaskellWorks.Data.PackedVector.InternalSpec
       HaskellWorks.Data.PackedVector.PackedVector64Spec
       HaskellWorks.Gen
       Paths_hw_packed_vector
-  hs-source-dirs:   test
-  ghc-options:      -threaded -rtsopts -with-rtsopts=-N
-  build-depends:    hw-packed-vector
-  build-tools:      hspec-discover
+  hs-source-dirs:       test
+  ghc-options:          -threaded -rtsopts -with-rtsopts=-N
+  build-depends:        hw-packed-vector
+  build-tool-depends:   hspec-discover:hspec-discover
 
 benchmark bench
   import:   base, config
@@ -111,9 +111,9 @@
           , hspec
           , hw-prim
           , vector
-  type:               exitcode-stdio-1.0
-  main-is:            Main.hs
-  hs-source-dirs:     bench
-  other-modules:      Paths_hw_packed_vector
-  build-depends:      hw-packed-vector
-  autogen-modules:    Paths_hw_packed_vector
+  type:                 exitcode-stdio-1.0
+  main-is:              Main.hs
+  hs-source-dirs:       bench
+  other-modules:        Paths_hw_packed_vector
+  build-depends:        hw-packed-vector
+  autogen-modules:      Paths_hw_packed_vector